There were several attempts by Muslim armies to conquer Constantinople before Ottoman Muslim Sultan Mehmet II el-Fatih (the Conqueror) overran the city's defenses in 1453. The Muslims were unable to conquer Constantinople in those attacks because of how well the city is fortified. The Old City of Constantinople is on a small peninsula and the city walls went right up to the water. This meant that no siege weaponry could be used on three sides of the city. Correspondingly, the only land-border of the city was extremely well-fortified and developed. Additionally, since the land border was west-facing, it would require the Muslims, who were generally coming from the east, to move around the city's north or south face and given the defenders of the city enough time to prepare an effective defense.
1453
The Muslims conquered the Iberian Penninsula
Yes, by defeating the Eastern Roman Empire, based in Constantinople and renamed Istanbul, and a section of the Western Roman Empire, including all of Northern Africa and most of Spain.
Yes they did. They managed to conquer Constantinople in 1204 and formed The Latin Empire of Constantinople until 1261 when The Emperor of Nicea reconquered the City for The Byzantine Empire.
He was unable to Conquer Germany.
They didn't.
1453
No. They left before they did.
The Muslims conquered the Iberian Penninsula
Yes, by defeating the Eastern Roman Empire, based in Constantinople and renamed Istanbul, and a section of the Western Roman Empire, including all of Northern Africa and most of Spain.
looted constantinople
Yes they did. They managed to conquer Constantinople in 1204 and formed The Latin Empire of Constantinople until 1261 when The Emperor of Nicea reconquered the City for The Byzantine Empire.
Constantinople.
He was unable to Conquer Germany.
Rome
The Ottoman Turks
The country Napoleon was never able to conquer was Great Britain.